WebSVN – HelenOS – Diff – /trunk/kernel/arch/xen32/src/boot/boot.S


#
# Copyright (C) 2001-2004 Jakub Jermar
# Copyright (C) 2005-2006 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
 
#include <arch/boot/boot.h>
 
#include <arch/mm/page.h>
#include <arch/pm.h>
 
.section __xen_guest
	.ascii  "GUEST_OS=HelenOS,"
	.ascii  "XEN_VER=xen-3.0,"
	.ascii  "HYPERCALL_PAGE=0x2,"
	.ascii  "LOADER=generic,"
	.ascii  "PT_MODE_WRITABLE"
	.byte   0
 
#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
 
.section K_TEXT_START, "ax"
 
KTEXT=8
KDATA=16
 
.code32
.align 4
.global multiboot_image_start
multiboot_header:
	.long MULTIBOOT_HEADER_MAGIC
	.long MULTIBOOT_HEADER_FLAGS
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
	.long multiboot_header
	.long unmapped_ktext_start
	.long 0
	.long 0
	.long multiboot_image_start
	
multiboot_image_start:
	movl $START_STACK, %esp			# initialize stack pointer
	lgdt KA2PA(bootstrap_gdtr)		# initialize Global Descriptor Table register
 
	movw $KDATA, %cx
	movw %cx, %es
	movw %cx, %fs
	movw %cx, %gs
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	
	jmpl $KTEXT, $multiboot_meeting_point
	multiboot_meeting_point:
	
	pushl %ebx							# save parameters from GRUB
	pushl %eax
	
#ifdef CONFIG_FB
	mov $vesa_init, %esi
	mov $VESA_INIT_SEGMENT << 4, %edi
	mov $e_vesa_init - vesa_init, %ecx
	cld
	rep movsb
 
	mov $VESA_INIT_SEGMENT << 4, %edi
	jmpl %edi
	
	vesa_meeting_point:
	
	mov %esi, KA2PA(vesa_ph_addr)
	mov %di, KA2PA(vesa_height)
	shr $16, %edi
	mov %di, KA2PA(vesa_width)
	mov %bx, KA2PA(vesa_scanline)
	shr $16, %ebx
	mov %bx, KA2PA(vesa_bpp)
#endif	
	
	call map_kernel							# map kernel and turn paging on
	
	popl %eax
	popl %ebx
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax				# compare GRUB signature
	je valid_boot
		
		xorl %ecx, %ecx							# no memory size or map available
		movl %ecx, e801memorysize
		movl %ecx, e820counter
		
		jmp invalid_boot
		
	valid_boot:
		
		movl (%ebx), %eax						# ebx = physical address of struct multiboot_info
		
		bt $0, %eax								# mbi->flags[0] (mem_lower, mem_upper valid)
		jc mem_valid
			
			xorl %ecx, %ecx
			jmp mem_invalid
			
		mem_valid:
		movl 4(%ebx), %ecx						# mbi->mem_lower
		addl 8(%ebx), %ecx						# mbi->mem_upper
		
		mem_invalid:
		movl %ecx, e801memorysize
		
		bt $3, %eax								# mbi->flags[3] (mods_count, mods_addr valid)
		jc mods_valid
			
			xorl %ecx, %ecx
			movl %ecx, init
			jmp mods_end
		
		mods_valid:
		
		movl 20(%ebx), %ecx						# mbi->mods_count
		movl %ecx, init
		
		cmpl $0, %ecx
		je mods_end
		
		movl 24(%ebx), %esi						# mbi->mods_addr
		movl $init, %edi
		
		mods_loop:
		
			movl 0(%esi), %edx					# mods->mod_start
			addl $0x80000000, %edx
			movl %edx, 4(%edi)
			
			movl 4(%esi), %edx
			subl 0(%esi), %edx					# mods->mod_end - mods->mod_start
			movl %edx, 8(%edi)
			
			addl $16, %esi
			addl $8	, %edi
			
			loop mods_loop
			
		mods_end:
		
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
	invalid_boot:
	
#ifdef CONFIG_SMP
	
	# copy AP bootstrap routines below 1 MB
	
	movl $BOOT_OFFSET, %esi
	movl $AP_BOOT_OFFSET, %edi
	movl $_hardcoded_unmapped_size, %ecx
	cld
	rep movsb
	
#endif
	
	call main_bsp								# never returns
 
	cli
	hlt
 
.global map_kernel
map_kernel:
	#
	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
	# For simplicity, we map the entire 4G space.
	#
	movl %cr4, %ecx
	orl $(1<<4), %ecx
	movl %ecx, %cr4							# turn PSE on
	
	movl $(page_directory+0), %esi
	movl $(page_directory+2048), %edi
	xorl %ecx, %ecx
	xorl %ebx, %ebx
0:
	movl $((1<<7)|(1<<0)), %eax
	orl %ebx, %eax
	movl %eax, (%esi,%ecx,4)					# mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M
	movl %eax, (%edi,%ecx,4)					# mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M
	addl $(4*1024*1024), %ebx
 
	incl %ecx
	cmpl $512, %ecx
	jl 0b
 
	movl %esi, %cr3
	
	# turn paging on
	movl %cr0, %ebx
	orl $(1<<31), %ebx
	movl %ebx, %cr0
	ret
 
#ifdef CONFIG_FB
vesa_init:
	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
	
.code16
vesa_init_real:
	
	mov %cr0, %eax
	and $~1, %eax
	mov %eax, %cr0
	
	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
	
vesa_init_real2:
	
	mov $VESA_INIT_SEGMENT, %bx
	
	mov %bx, %es
	mov %bx, %fs
	mov %bx, %gs
	mov %bx, %ds
	mov %bx, %ss
	
	movl %esp, %eax
	movl $0x0000fffc, %esp
	movl $0x0000fffc, %ebp
	pushl %eax
	
#define VESA_INFO_SIZE 1024
 
#define VESA_MODE_LIST_PTR_OFFSET 14
#define VESA_MODE_WIDTH_OFFSET 18
#define VESA_MODE_HEIGHT_OFFSET 20
#define VESA_MODE_BPP_OFFSET 25
#define VESA_MODE_SCANLINE_OFFSET 16
#define VESA_MODE_PHADDR_OFFSET 40
 
#define VESA_END_OF_MODES 0xffff
 
#define VESA_OK 0x4f
 
#define VESA_GET_INFO 0x4f00
#define VESA_GET_MODE_INFO 0x4f01
#define VESA_SET_MODE 0x4f02
 
#define CONFIG_VESA_BPP_a 255
 
#if CONFIG_VESA_BPP == 24
#undef CONFIG_VESA_BPP_a
#define CONFIG_VESA_BPP_a 32
#endif
 
	mov $VESA_GET_INFO, %ax
	mov $e_vesa_init - vesa_init, %di
	push %di
	int $0x10
	
	pop %di
	cmp $VESA_OK, %al
	jnz 0f
	
	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
	mov %si, %gs
	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
	
	add $VESA_INFO_SIZE, %di
 
1:# Try next mode
	mov %gs:(%si), %cx
	cmp $VESA_END_OF_MODES, %cx
	jz 0f
	
	inc %si
	inc %si
	push %cx
	push %di
	push %si
	mov $VESA_GET_MODE_INFO, %ax
	int $0x10
	
	pop %si
	pop %di
	pop %cx
	cmp $VESA_OK, %al
	jnz 0f
	
	mov $CONFIG_VESA_WIDTH, %ax
	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
	jnz 1b
	
	mov $CONFIG_VESA_HEIGHT,%ax
	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
	jnz 1b
	
	mov $CONFIG_VESA_BPP, %al
	cmp VESA_MODE_BPP_OFFSET(%di), %al
	jz 2f
	
	mov $CONFIG_VESA_BPP_a, %al
	cmp VESA_MODE_BPP_OFFSET(%di), %al
	jnz 1b
	
2:
	
	mov %cx, %bx
	or $0xc000, %bx
	push %di
	mov $VESA_SET_MODE, %ax
	int $0x10
	
	pop %di
	cmp $VESA_OK, %al
	jnz 0f
	
	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
	shl $16, %eax
	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
	mov VESA_MODE_BPP_OFFSET(%di), %bl
	xor %bh, %bh
	shl $16, %ebx
	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
	mov %eax, %edi
	
8:	
	
	mov %cr0, %eax
	or $1, %eax
	mov %eax, %cr0
	
	jmp 9f
9:
	
	ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
 
0:# No prefered mode found
	mov $0x111, %cx
	push %di
	push %cx
	mov $VESA_GET_MODE_INFO, %ax
	int $0x10
	
	pop %cx
	pop %di
	cmp $VESA_OK, %al
	jnz 1f
	jz 2b						# Force relative jump
	
1:
	mov $0x0003, %ax
	int $0x10
	mov $0xffffffff, %edi		# EGA text mode used, because of problems with VESA
	xor %ax, %ax
	jz 8b						# Force relative jump
	
 
.code32
vesa_init_protect:
	popl %esp
 
	movw $KDATA, %cx
	movw %cx, %es
	movw %cx, %fs
	movw %cx, %gs
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	
	jmpl $KTEXT, $vesa_meeting_point
 
.align 4
e_vesa_init:
#endif	
 
.section K_DATA_START, "aw", @progbits
 
.align 4096
page_directory:
	.space 4096, 0
 

Rev 1805	Rev 1806
1	#	1	#
2	# Copyright (C) 2001-2004 Jakub Jermar	2	# Copyright (C) 2001-2004 Jakub Jermar
3	# Copyright (C) 2005-2006 Martin Decky	3	# Copyright (C) 2005-2006 Martin Decky
4	# All rights reserved.	4	# All rights reserved.
5	#	5	#
6	# Redistribution and use in source and binary forms, with or without	6	# Redistribution and use in source and binary forms, with or without
7	# modification, are permitted provided that the following conditions	7	# modification, are permitted provided that the following conditions
8	# are met:	8	# are met:
9	#	9	#
10	# - Redistributions of source code must retain the above copyright	10	# - Redistributions of source code must retain the above copyright
11	# notice, this list of conditions and the following disclaimer.	11	# notice, this list of conditions and the following disclaimer.
12	# - Redistributions in binary form must reproduce the above copyright	12	# - Redistributions in binary form must reproduce the above copyright
13	# notice, this list of conditions and the following disclaimer in the	13	# notice, this list of conditions and the following disclaimer in the
14	# documentation and/or other materials provided with the distribution.	14	# documentation and/or other materials provided with the distribution.
15	# - The name of the author may not be used to endorse or promote products	15	# - The name of the author may not be used to endorse or promote products
16	# derived from this software without specific prior written permission.	16	# derived from this software without specific prior written permission.
17	#	17	#
18	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	#	28	#
29		29
30	#include <arch/boot/boot.h>	30	#include <arch/boot/boot.h>
31	#include <arch/boot/memmap.h>	-
32	#include <arch/mm/page.h>	31	#include <arch/mm/page.h>
33	#include <arch/pm.h>	32	#include <arch/pm.h>
34		33
35	.section __xen_guest	34	.section __xen_guest
36	.ascii "GUEST_OS=HelenOS,"	35	.ascii "GUEST_OS=HelenOS,"
37	.ascii "XEN_VER=xen-3.0,"	36	.ascii "XEN_VER=xen-3.0,"
38	.ascii "HYPERCALL_PAGE=0x2,"	37	.ascii "HYPERCALL_PAGE=0x2,"
39	.ascii "LOADER=generic,"	38	.ascii "LOADER=generic,"
40	.ascii "PT_MODE_WRITABLE"	39	.ascii "PT_MODE_WRITABLE"
41	.byte 0	40	.byte 0
42		41
43	#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)	42	#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
44		43
45	.section K_TEXT_START, "ax"	44	.section K_TEXT_START, "ax"
46		45
47	KTEXT=8	46	KTEXT=8
48	KDATA=16	47	KDATA=16
49		48
50	.code32	49	.code32
51	.align 4	50	.align 4
52	.global multiboot_image_start	51	.global multiboot_image_start
53	multiboot_header:	52	multiboot_header:
54	.long MULTIBOOT_HEADER_MAGIC	53	.long MULTIBOOT_HEADER_MAGIC
55	.long MULTIBOOT_HEADER_FLAGS	54	.long MULTIBOOT_HEADER_FLAGS
56	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum	55	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum
57	.long multiboot_header	56	.long multiboot_header
58	.long unmapped_ktext_start	57	.long unmapped_ktext_start
59	.long 0	58	.long 0
60	.long 0	59	.long 0
61	.long multiboot_image_start	60	.long multiboot_image_start
62		61
63	multiboot_image_start:	62	multiboot_image_start:
64	movl $START_STACK, %esp # initialize stack pointer	63	movl $START_STACK, %esp # initialize stack pointer
65	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register	64	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register
66		65
67	movw $KDATA, %cx	66	movw $KDATA, %cx
68	movw %cx, %es	67	movw %cx, %es
69	movw %cx, %fs	68	movw %cx, %fs
70	movw %cx, %gs	69	movw %cx, %gs
71	movw %cx, %ds # kernel data + stack	70	movw %cx, %ds # kernel data + stack
72	movw %cx, %ss	71	movw %cx, %ss
73		72
74	jmpl $KTEXT, $multiboot_meeting_point	73	jmpl $KTEXT, $multiboot_meeting_point
75	multiboot_meeting_point:	74	multiboot_meeting_point:
76		75
77	pushl %ebx # save parameters from GRUB	76	pushl %ebx # save parameters from GRUB
78	pushl %eax	77	pushl %eax
79		78
80	#ifdef CONFIG_FB	79	#ifdef CONFIG_FB
81	mov $vesa_init, %esi	80	mov $vesa_init, %esi
82	mov $VESA_INIT_SEGMENT << 4, %edi	81	mov $VESA_INIT_SEGMENT << 4, %edi
83	mov $e_vesa_init - vesa_init, %ecx	82	mov $e_vesa_init - vesa_init, %ecx
84	cld	83	cld
85	rep movsb	84	rep movsb
86		85
87	mov $VESA_INIT_SEGMENT << 4, %edi	86	mov $VESA_INIT_SEGMENT << 4, %edi
88	jmpl %edi	87	jmpl %edi
89		88
90	vesa_meeting_point:	89	vesa_meeting_point:
91		90
92	mov %esi, KA2PA(vesa_ph_addr)	91	mov %esi, KA2PA(vesa_ph_addr)
93	mov %di, KA2PA(vesa_height)	92	mov %di, KA2PA(vesa_height)
94	shr $16, %edi	93	shr $16, %edi
95	mov %di, KA2PA(vesa_width)	94	mov %di, KA2PA(vesa_width)
96	mov %bx, KA2PA(vesa_scanline)	95	mov %bx, KA2PA(vesa_scanline)
97	shr $16, %ebx	96	shr $16, %ebx
98	mov %bx, KA2PA(vesa_bpp)	97	mov %bx, KA2PA(vesa_bpp)
99	#endif	98	#endif
100		99
101	call map_kernel # map kernel and turn paging on	100	call map_kernel # map kernel and turn paging on
102		101
103	popl %eax	102	popl %eax
104	popl %ebx	103	popl %ebx
105	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature	104	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature
106	je valid_boot	105	je valid_boot
107		106
108	xorl %ecx, %ecx # no memory size or map available	107	xorl %ecx, %ecx # no memory size or map available
109	movl %ecx, e801memorysize	108	movl %ecx, e801memorysize
110	movl %ecx, e820counter	109	movl %ecx, e820counter
111		110
112	jmp invalid_boot	111	jmp invalid_boot
113		112
114	valid_boot:	113	valid_boot:
115		114
116	movl (%ebx), %eax # ebx = physical address of struct multiboot_info	115	movl (%ebx), %eax # ebx = physical address of struct multiboot_info
117		116
118	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)	117	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)
119	jc mem_valid	118	jc mem_valid
120		119
121	xorl %ecx, %ecx	120	xorl %ecx, %ecx
122	jmp mem_invalid	121	jmp mem_invalid
123		122
124	mem_valid:	123	mem_valid:
125	movl 4(%ebx), %ecx # mbi->mem_lower	124	movl 4(%ebx), %ecx # mbi->mem_lower
126	addl 8(%ebx), %ecx # mbi->mem_upper	125	addl 8(%ebx), %ecx # mbi->mem_upper
127		126
128	mem_invalid:	127	mem_invalid:
129	movl %ecx, e801memorysize	128	movl %ecx, e801memorysize
130		129
131	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)	130	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)
132	jc mods_valid	131	jc mods_valid
133		132
134	xorl %ecx, %ecx	133	xorl %ecx, %ecx
135	movl %ecx, init	134	movl %ecx, init
136	jmp mods_end	135	jmp mods_end
137		136
138	mods_valid:	137	mods_valid:
139		138
140	movl 20(%ebx), %ecx # mbi->mods_count	139	movl 20(%ebx), %ecx # mbi->mods_count
141	movl %ecx, init	140	movl %ecx, init
142		141
143	cmpl $0, %ecx	142	cmpl $0, %ecx
144	je mods_end	143	je mods_end
145		144
146	movl 24(%ebx), %esi # mbi->mods_addr	145	movl 24(%ebx), %esi # mbi->mods_addr
147	movl $init, %edi	146	movl $init, %edi
148		147
149	mods_loop:	148	mods_loop:
150		149
151	movl 0(%esi), %edx # mods->mod_start	150	movl 0(%esi), %edx # mods->mod_start
152	addl $0x80000000, %edx	151	addl $0x80000000, %edx
153	movl %edx, 4(%edi)	152	movl %edx, 4(%edi)
154		153
155	movl 4(%esi), %edx	154	movl 4(%esi), %edx
156	subl 0(%esi), %edx # mods->mod_end - mods->mod_start	155	subl 0(%esi), %edx # mods->mod_end - mods->mod_start
157	movl %edx, 8(%edi)	156	movl %edx, 8(%edi)
158		157
159	addl $16, %esi	158	addl $16, %esi
160	addl $8 , %edi	159	addl $8 , %edi
161		160
162	loop mods_loop	161	loop mods_loop
163		162
164	mods_end:	163	mods_end:
165		164
166	bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)	-
167	jc mmap_valid	-
168		-
169	xorl %edx, %edx	-
170	jmp mmap_invalid	-
171		-
172	mmap_valid:	-
173	movl 44(%ebx), %ecx # mbi->mmap_length	-
174	movl 48(%ebx), %esi # mbi->mmap_addr	-
175	movl $e820table, %edi	-
176	xorl %edx, %edx	-
177		-
178	mmap_loop:	-
179	cmpl $0, %ecx	-
180	jle mmap_end	-
181		-
182	movl 4(%esi), %eax # mmap->base_addr_low	-
183	movl %eax, (%edi)	-
184		-
185	movl 8(%esi), %eax # mmap->base_addr_high	-
186	movl %eax, 4(%edi)	-
187		-
188	movl 12(%esi), %eax # mmap->length_low	-
189	movl %eax, 8(%edi)	-
190		-
191	movl 16(%esi), %eax # mmap->length_high	-
192	movl %eax, 12(%edi)	-
193		-
194	movl 20(%esi), %eax # mmap->type	-
195	movl %eax, 16(%edi)	-
196		-
197	movl (%esi), %eax # mmap->size	-
198	addl $0x4, %eax	-
199	addl %eax, %esi	-
200	subl %eax, %ecx	-
201	addl $MEMMAP_E820_RECORD_SIZE, %edi	-
202	incl %edx	-
203	jmp mmap_loop	-
204		-
205	mmap_end:	-
206		-
207	mmap_invalid:	-
208	movl %edx, e820counter	-
209		-
210	invalid_boot:	165	invalid_boot:
211		166
212	#ifdef CONFIG_SMP	167	#ifdef CONFIG_SMP
213		168
214	# copy AP bootstrap routines below 1 MB	169	# copy AP bootstrap routines below 1 MB
215		170
216	movl $BOOT_OFFSET, %esi	171	movl $BOOT_OFFSET, %esi
217	movl $AP_BOOT_OFFSET, %edi	172	movl $AP_BOOT_OFFSET, %edi
218	movl $_hardcoded_unmapped_size, %ecx	173	movl $_hardcoded_unmapped_size, %ecx
219	cld	174	cld
220	rep movsb	175	rep movsb
221		176
222	#endif	177	#endif
223		178
224	call main_bsp # never returns	179	call main_bsp # never returns
225		180
226	cli	181	cli
227	hlt	182	hlt
228		183
229	.global map_kernel	184	.global map_kernel
230	map_kernel:	185	map_kernel:
231	#	186	#
232	# Here we setup mapping for both the unmapped and mapped sections of the kernel.	187	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
233	# For simplicity, we map the entire 4G space.	188	# For simplicity, we map the entire 4G space.
234	#	189	#
235	movl %cr4, %ecx	190	movl %cr4, %ecx
236	orl $(1<<4), %ecx	191	orl $(1<<4), %ecx
237	movl %ecx, %cr4 # turn PSE on	192	movl %ecx, %cr4 # turn PSE on
238		193
239	movl $(page_directory+0), %esi	194	movl $(page_directory+0), %esi
240	movl $(page_directory+2048), %edi	195	movl $(page_directory+2048), %edi
241	xorl %ecx, %ecx	196	xorl %ecx, %ecx
242	xorl %ebx, %ebx	197	xorl %ebx, %ebx
243	0:	198	0:
244	movl $((1<<7)\|(1<<0)), %eax	199	movl $((1<<7)\|(1<<0)), %eax
245	orl %ebx, %eax	200	orl %ebx, %eax
246	movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx4M => 0x00000000+%ecx4M	201	movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx4M => 0x00000000+%ecx4M
247	movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx4M => 0x00000000+%ecx4M	202	movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx4M => 0x00000000+%ecx4M
248	addl $(410241024), %ebx	203	addl $(410241024), %ebx
249		204
250	incl %ecx	205	incl %ecx
251	cmpl $512, %ecx	206	cmpl $512, %ecx
252	jl 0b	207	jl 0b
253		208
254	movl %esi, %cr3	209	movl %esi, %cr3
255		210
256	# turn paging on	211	# turn paging on
257	movl %cr0, %ebx	212	movl %cr0, %ebx
258	orl $(1<<31), %ebx	213	orl $(1<<31), %ebx
259	movl %ebx, %cr0	214	movl %ebx, %cr0
260	ret	215	ret
261		216
262	#ifdef CONFIG_FB	217	#ifdef CONFIG_FB
263	vesa_init:	218	vesa_init:
264	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init	219	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
265		220
266	.code16	221	.code16
267	vesa_init_real:	222	vesa_init_real:
268		223
269	mov %cr0, %eax	224	mov %cr0, %eax
270	and $~1, %eax	225	and $~1, %eax
271	mov %eax, %cr0	226	mov %eax, %cr0
272		227
273	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init	228	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
274		229
275	vesa_init_real2:	230	vesa_init_real2:
276		231
277	mov $VESA_INIT_SEGMENT, %bx	232	mov $VESA_INIT_SEGMENT, %bx
278		233
279	mov %bx, %es	234	mov %bx, %es
280	mov %bx, %fs	235	mov %bx, %fs
281	mov %bx, %gs	236	mov %bx, %gs
282	mov %bx, %ds	237	mov %bx, %ds
283	mov %bx, %ss	238	mov %bx, %ss
284		239
285	movl %esp, %eax	240	movl %esp, %eax
286	movl $0x0000fffc, %esp	241	movl $0x0000fffc, %esp
287	movl $0x0000fffc, %ebp	242	movl $0x0000fffc, %ebp
288	pushl %eax	243	pushl %eax
289		244
290	#define VESA_INFO_SIZE 1024	245	#define VESA_INFO_SIZE 1024
291		246
292	#define VESA_MODE_LIST_PTR_OFFSET 14	247	#define VESA_MODE_LIST_PTR_OFFSET 14
293	#define VESA_MODE_WIDTH_OFFSET 18	248	#define VESA_MODE_WIDTH_OFFSET 18
294	#define VESA_MODE_HEIGHT_OFFSET 20	249	#define VESA_MODE_HEIGHT_OFFSET 20
295	#define VESA_MODE_BPP_OFFSET 25	250	#define VESA_MODE_BPP_OFFSET 25
296	#define VESA_MODE_SCANLINE_OFFSET 16	251	#define VESA_MODE_SCANLINE_OFFSET 16
297	#define VESA_MODE_PHADDR_OFFSET 40	252	#define VESA_MODE_PHADDR_OFFSET 40
298		253
299	#define VESA_END_OF_MODES 0xffff	254	#define VESA_END_OF_MODES 0xffff
300		255
301	#define VESA_OK 0x4f	256	#define VESA_OK 0x4f
302		257
303	#define VESA_GET_INFO 0x4f00	258	#define VESA_GET_INFO 0x4f00
304	#define VESA_GET_MODE_INFO 0x4f01	259	#define VESA_GET_MODE_INFO 0x4f01
305	#define VESA_SET_MODE 0x4f02	260	#define VESA_SET_MODE 0x4f02
306		261
307	#define CONFIG_VESA_BPP_a 255	262	#define CONFIG_VESA_BPP_a 255
308		263
309	#if CONFIG_VESA_BPP == 24	264	#if CONFIG_VESA_BPP == 24
310	#undef CONFIG_VESA_BPP_a	265	#undef CONFIG_VESA_BPP_a
311	#define CONFIG_VESA_BPP_a 32	266	#define CONFIG_VESA_BPP_a 32
312	#endif	267	#endif
313		268
314	mov $VESA_GET_INFO, %ax	269	mov $VESA_GET_INFO, %ax
315	mov $e_vesa_init - vesa_init, %di	270	mov $e_vesa_init - vesa_init, %di
316	push %di	271	push %di
317	int $0x10	272	int $0x10
318		273
319	pop %di	274	pop %di
320	cmp $VESA_OK, %al	275	cmp $VESA_OK, %al
321	jnz 0f	276	jnz 0f
322		277
323	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si	278	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
324	mov %si, %gs	279	mov %si, %gs
325	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si	280	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
326		281
327	add $VESA_INFO_SIZE, %di	282	add $VESA_INFO_SIZE, %di
328		283
329	1:# Try next mode	284	1:# Try next mode
330	mov %gs:(%si), %cx	285	mov %gs:(%si), %cx
331	cmp $VESA_END_OF_MODES, %cx	286	cmp $VESA_END_OF_MODES, %cx
332	jz 0f	287	jz 0f
333		288
334	inc %si	289	inc %si
335	inc %si	290	inc %si
336	push %cx	291	push %cx
337	push %di	292	push %di
338	push %si	293	push %si
339	mov $VESA_GET_MODE_INFO, %ax	294	mov $VESA_GET_MODE_INFO, %ax
340	int $0x10	295	int $0x10
341		296
342	pop %si	297	pop %si
343	pop %di	298	pop %di
344	pop %cx	299	pop %cx
345	cmp $VESA_OK, %al	300	cmp $VESA_OK, %al
346	jnz 0f	301	jnz 0f
347		302
348	mov $CONFIG_VESA_WIDTH, %ax	303	mov $CONFIG_VESA_WIDTH, %ax
349	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax	304	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
350	jnz 1b	305	jnz 1b
351		306
352	mov $CONFIG_VESA_HEIGHT,%ax	307	mov $CONFIG_VESA_HEIGHT,%ax
353	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax	308	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
354	jnz 1b	309	jnz 1b
355		310
356	mov $CONFIG_VESA_BPP, %al	311	mov $CONFIG_VESA_BPP, %al
357	cmp VESA_MODE_BPP_OFFSET(%di), %al	312	cmp VESA_MODE_BPP_OFFSET(%di), %al
358	jz 2f	313	jz 2f
359		314
360	mov $CONFIG_VESA_BPP_a, %al	315	mov $CONFIG_VESA_BPP_a, %al
361	cmp VESA_MODE_BPP_OFFSET(%di), %al	316	cmp VESA_MODE_BPP_OFFSET(%di), %al
362	jnz 1b	317	jnz 1b
363		318
364	2:	319	2:
365		320
366	mov %cx, %bx	321	mov %cx, %bx
367	or $0xc000, %bx	322	or $0xc000, %bx
368	push %di	323	push %di
369	mov $VESA_SET_MODE, %ax	324	mov $VESA_SET_MODE, %ax
370	int $0x10	325	int $0x10
371		326
372	pop %di	327	pop %di
373	cmp $VESA_OK, %al	328	cmp $VESA_OK, %al
374	jnz 0f	329	jnz 0f
375		330
376	mov VESA_MODE_PHADDR_OFFSET(%di), %esi	331	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
377	mov VESA_MODE_WIDTH_OFFSET(%di), %ax	332	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
378	shl $16, %eax	333	shl $16, %eax
379	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax	334	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
380	mov VESA_MODE_BPP_OFFSET(%di), %bl	335	mov VESA_MODE_BPP_OFFSET(%di), %bl
381	xor %bh, %bh	336	xor %bh, %bh
382	shl $16, %ebx	337	shl $16, %ebx
383	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx	338	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
384	mov %eax, %edi	339	mov %eax, %edi
385		340
386	8:	341	8:
387		342
388	mov %cr0, %eax	343	mov %cr0, %eax
389	or $1, %eax	344	or $1, %eax
390	mov %eax, %cr0	345	mov %eax, %cr0
391		346
392	jmp 9f	347	jmp 9f
393	9:	348	9:
394		349
395	ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)	350	ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
396		351
397	0:# No prefered mode found	352	0:# No prefered mode found
398	mov $0x111, %cx	353	mov $0x111, %cx
399	push %di	354	push %di
400	push %cx	355	push %cx
401	mov $VESA_GET_MODE_INFO, %ax	356	mov $VESA_GET_MODE_INFO, %ax
402	int $0x10	357	int $0x10
403		358
404	pop %cx	359	pop %cx
405	pop %di	360	pop %di
406	cmp $VESA_OK, %al	361	cmp $VESA_OK, %al
407	jnz 1f	362	jnz 1f
408	jz 2b # Force relative jump	363	jz 2b # Force relative jump
409		364
410	1:	365	1:
411	mov $0x0003, %ax	366	mov $0x0003, %ax
412	int $0x10	367	int $0x10
413	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA	368	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA
414	xor %ax, %ax	369	xor %ax, %ax
415	jz 8b # Force relative jump	370	jz 8b # Force relative jump
416		371
417		372
418	.code32	373	.code32
419	vesa_init_protect:	374	vesa_init_protect:
420	popl %esp	375	popl %esp
421		376
422	movw $KDATA, %cx	377	movw $KDATA, %cx
423	movw %cx, %es	378	movw %cx, %es
424	movw %cx, %fs	379	movw %cx, %fs
425	movw %cx, %gs	380	movw %cx, %gs
426	movw %cx, %ds # kernel data + stack	381	movw %cx, %ds # kernel data + stack
427	movw %cx, %ss	382	movw %cx, %ss
428		383
429	jmpl $KTEXT, $vesa_meeting_point	384	jmpl $KTEXT, $vesa_meeting_point
430		385
431	.align 4	386	.align 4
432	e_vesa_init:	387	e_vesa_init:
433	#endif	388	#endif
434		389
435	.section K_DATA_START, "aw", @progbits	390	.section K_DATA_START, "aw", @progbits
436		391
437	.align 4096	392	.align 4096
438	page_directory:	393	page_directory:
439	.space 4096, 0	394	.space 4096, 0
440		395

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/xen32/src/boot/boot.S – Rev 1805 → 1806